Lenovo 5b21j76561 Laptop System Board I5-1245u 16GB

Product Description

The LENOVO 5b21j76561 is an OEM replacement system board designed for Lenovo laptop computers. The board integrates an Intel Core i5-1245U processor and 16GB of onboard RAM, making it a complete logic board assembly rather than a bare PCB requiring separate processor installation. Technicians replace this board when the original fails due to power faults, GPU failure, corrupted firmware, or physical damage to onboard components. This is a Lenovo genuine parts component intended for depot-level or advanced field repair.

This system board is intended for use in Lenovo laptop systems configured with the Intel Core i5-1245U processor, 16GB of integrated memory, and a Windows operating system environment. The part code suffix indicates specific factory configuration options including display, storage interface, and regional build variants. Repair depots and authorized service centers are the primary installers of this component.

Key Features

• Integrated Intel Core i5-1245U processor — no separate CPU installation required
• 16GB onboard RAM — memory is soldered to the board
• OEM Lenovo genuine replacement part
• Factory-configured for specific display, storage, and regional build options per the part number suffix
• Designed for depot-level laptop board replacement procedures

Compatibility

Designed as an OEM replacement system board for Lenovo laptop models configured with the Intel Core i5-1245U processor and 16GB onboard memory. Verify the exact configuration code against the original board before ordering, as system boards with similar processor configurations may have incompatible I/O layouts or firmware dependencies.

Installation Notes

System board replacement should be performed by a qualified computer repair technician or Lenovo-authorized service depot. Disconnect all power sources including the main battery and any auxiliary battery before beginning disassembly. Anti-static precautions are required throughout the procedure. Re-flashing firmware or reconfiguring embedded controller settings may be necessary after board replacement depending on system configuration.

Technical Specifications

• Processor: Intel Core i5-1245U (integrated)
• Memory: 16GB (onboard, soldered)
• Operating System Compatibility: Windows
• Component Type: System Board (Motherboard Assembly)

Standard Information

• Brand: LENOVO
• Manufacturer Part Number: 5b21j76561